可燃气体探测器出现通气无反应故障时，可能的原因有（）。A、检

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问题多项选择题

可燃气体探测器出现通气无反应故障时，可能的原因有（）。

A、检测气体为惰性气体

B、探头失效

C、电路故障

D、zero电位器调整值偏高

答案

参考答案：A, B, C

选择题

The cables __________ a power station where we make electricity. [ ]

A. connect to

B. are connected to

C. are connected

D. connects

选择题

He lost both of his parents in the big earthquake, but ________ for him, a kind couple adopted him

and took good care of him.[ ]

A. suddenly

B. naturally

C. obviously

D. luckily